This welding head is special designed for tube to tube TIG welding,suitable for carbon steel,stainless steel tube to tube butt joint.lt's fit for fusion welding or wire feeding with external TB1501 integrated wire feeder with AVC&OSC function.lt is compatible with iOrbital5000 programmable toachieve accurate orbital TIG welding for tube/tubewelding with high repeatability.lt mainly applied inchemical,food,medicine,engineering installation,boiler,military,nuclear and so on.